Line-spacing mechanism for type-writers.



Witnesses J; E. MOLLE.

LINE SPAOING MECHANISM FOR TYPE WRITERSJ APPLICATION FILED FEB.10, 1913.

1,081,459, Patented Dec. 16, 1913.-

one or more lines, as desired.

EDI-1N E. MOLLE, OE VJAUSAU, VVI SCONSIN.

LINE-SPACING MECHANISM iron TYPn-wmrnas.

Specification of Letters Patent.

Patented Dec. 16, 1913.

Original application filed August 3, 1908, Serial 170,446,677. RenewedDecember 12, 1911, Serial No.

665,378. Divided and this application filed February 10, 1913. SerialNo. 747,506. 1'

To aZZ whom it may concern:

Be it known that I, JOHN E. MoLLn, a citizen of the United States,residing at Wausau, in the county State of Wisconsin, have invented anew and useful Line-Spacing Mechanism for Type-Writers, of which thefollowing is a specification.

This invention relates to line spacing mechanism for typewriters and ismore particularly a division of an application for United States LettersPatent filed by me on August 3, 1908, Serial No. 446,677, and renewed onDecember 12, 1911, Serial No. 665,378..

One of the objects of the invention is to provide simple and compactmechanism for rotating the platen, said mechanism including an adjustingelement whereby the platen can be caused to rotate to shift the paper Afurther object is to provide mechanism of this character utilizingasingle spring for holding the adjusting element in any position to whichitmay be shifted and for holding the pawl and its actuating levernormally in set positions.

WVith the foregoing and other objects in .view which will appear as the.description proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of the invention herein disclosed can be made within thescope of what is claimed, without departing from the spirit of theinvention.

'In the accompanying :S.rawings the preferred form of the invention hasbeen shown. In said drawings :-F igure 1 is an end elevation of acarriage having the present improvements combined therewith. F 1g. 2 isa plan view of one end portion of the carriage and of the platenshifting mechanism thereon. Fig. 3 is a view similar to Fig. 2 butshowing a portion of the mechanism in section, one of the positions ofthe adjusting 'cam beingindicated by dotted lines. Fig. 4:

is a section on line A-B Fig: 3, the restraining dog and the rackshifting lever being shown in section.

Referring to the figures by characters of reference 33 designates acylindrical platen of the usual or any preferredtype, the same beingmounted upon a carriage having end of Marathon and.

hen indicated by dotted lines plates one of which is shown at 34. Theseplates are suitably connected, and arranged back of theplaten is a plate54 constituting a paper guide. A depending bar is pivotally connected tothe end plate 3 1 and carries, at its lower end, a rack bar C1. This barmay be made in one piece with the bar 60 and it is tobe understood that,if desired, one of the bars 60 may be located at each end of thecarriage. The bar 60 extends upwardlyto form a lever 63 the upper endportion of which can be oflset to form a thumbpiece 64 adjacent theusual manipulating knob 65 of the platen. The foregoing parts constituteno parts of the-present invention but have merely been described asforming a part of the structure to which the present improvements are tobe applied.

Secured to one of the end plates 34 of the carriage is a bracket 190which may be fornr ed in a plate bent to form upper and lower leaves orthicknesses each of which is tapered toward its outer end as shown. Atthe outer ends of these leaves is. pivoted a line-spacing lever 191 the.free end of which is formed into a thumb piece 192. .The short arm ofthe lever is housed between the two leaves or legs of the bracket 190and is made up of upper and lower wings between which is pivoted one endof a pawl 193, the other end of which is adapted to engage a ratchetwheel 191 on the platen shaft. A Ushaped strip is pivotally mountedbetween its ends upon the end plate 34and constitutes a re strainingpawl 195, this pawl carrying a roller 1.95 which is held constantly in.con-

tact with the periphery of the ratchet wheel 19-1 by a spring 196 asshown particularly in Figs; 1 and r. A spring 196 is mounted on thepivot 197 of lever 191 and one leg of this spring engages a pin 198 onpawl 193. The other leg oi. the spring engages a regulating or adjustinglever 199 mounted in the bracket 1.90. The movement of the lever 191 inthe direction urged by the spring 196 is limited by a stop pm 200carried by the bracket 190.

Whcn the lever 191 is grasped to return the carriage to its initialposition, as ordinarily, spring 196 first yields so as to permit saidlever to pull on the pawl 193 thereby to cause the ratchet wheel. 194-to rotate. .The extent of this'rotation is determined by the lever 199which may be shifted to the posiin --I*ig. 3, thus two line spaces.

1 pawl 193 and the It will be appar' ntthat when the platen to permitonly suiiicient movement of the pawl to rotate. the platen one linespace or which can be shifted to the cated by full lines in Fig. .3,thereby to permit greater movement of the pawl 193 and lever 191 andcorrespondingly greater movement out the platen which can thus berotated It will be apparent that spring 196' operates to hold lever 199in either of the positions to which-it may be shifted and, furthermore,serves to hold the lever 191 normally set.

and its ratchet wheel 1% are rotated the teeth of then'atcliet wheel.will escape over the roller 195 carried by the pawl 195 but the spring196 will press said roller against-the ratchet wheel with sufiicient'force to prevent the platen fromrotating too freely. I

What is claimed is 1. In a typewriter, a platen mounted for -rotation, aratchet wheel revoluble therev and adjustable -ing said regulating 2. Ina typewriter, a carriage, a platen,

a ratchet wheel, a linespa cing lever movable with the carriage, apawlcarried thereby, an adjusting lever, and a spring mounted on thepivot of the line-spacing lever and having its legs in engagement withthe pawl and adjusting lever respectively to hold the pawl andline-spacing lever in normal positions and to hold the adjusting leverinadjusted position.

3. The combination with a typewriter carriage,a platen mounted to rotatethereon,

and a ratchet wheel connected with the platen, of a bracket, aline-spac'ng lever pivotally mounted within the bracket and havingspaced wings constituting one arm thereof, apawl pivotally mountedbetween the wings, an adjusting lever p voted with in the bracket andmovable angularly to Copies of position indir limit the movement of theline-spar I 1g lever and pawl in one direction, and a spring mounted onthe pivot of the line-spacing lever and having its ends engaging saidadjusting lever and the pawl respectively to hold the adjusting lever inany position to which it may be shifted and to hold the pawl andline-spacing lever in normal positions.

4. Platen rotating mechanism for typewriters, including a ratchetwheel'revoluble with the platen a bracket movablefwith the'carria'ge, aline-spacing lever fulcrumed within the bracket, apawl pivotally connected to one arm of said lever, an adjusting lever mounted within thebracket and ad justable angularly to limit the movement ot the pawl'inone direction, and a spring engaging the pivot of the line-spacing leverand having its legs engaging the pawl and the adjusting leverrespectively for holding the pawl normally disengaged from the ratchetwheel and for holding the adjusting lever against accidental movementabout its axis.

5. Platen rotating .mechanlsm for typewriters, including a ratchet wheelrevolublc with the platen, carriage, a line-spacingwithin the bracket, apawlpivotally 'con-, nected tonne arm of said lever, an adjusting levermounted within the bracket and adthe pawl in one direction, a springengaging the pivot ofthe line-spacing lever and having its legs engagingthe pawl and the adjusting lever respectively for holding the pawlnormally disengaged from the ratchet wheel and for holding the adjustinglever against accidental movement about its axis,

JOHN E. MOLLE.

Witnesses i" Bonner SCHMIDT,

this patent may be obtained for five cents each, by addressing theCommissioner of Patents.

. Man'rna CLAUssnN.

a bracket movable with the lever tulcrumed justable angularlyto limitthe movement of

